Pipe-coupling.



No. 884,371. PATENTED APR. 14, 1908.

S. R. DRESSER.

PIPE GOUPLING.

Aflmdulou FILED JULY 9, 1906. I

2 SHEETS-SHEET 1.

WITNES Al/orneyp I 'PATENTED APR. 14, 1908.

S. R. DRESSER. PIPE COUPLING.

APPLIOATION FILED JULY 9 1906 2 SHEETS-SHEET 2,

[/VVE/V TOR Altar nap Big. '5 is a p SOLOMON R. DRESSER, OF BRADFORD,PENNSYLVANIA, ASSIGNOR TO S. R, DRESSER MANU- FACTURING'OOMPANY, OFBRADFORD, PENNSYLVANIA.

PIPE-COUPLING.

No. ssasvr.

Specification 05. Letters Patent.

Patented April 141-, 1808. 7

Application filed July 9, 1905. Serial No. 325,877.

To all whom it may concern:

Be it known that I, SOLOMON R. Dnnssnn, a citizen of the United States,residing at- Bradford, in the county of McKean andState of Pennsylvania,have invented certain new and useful improvements in Pi e-Couplin s; andI do here y declare the f0 owing to e a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which use the same.

My invention consists in the novel features it appertains to make andhereinafter described reference being had,

Fig. dis an enlarged detail sectional view showing the acking ring, andadjacent parts. lan view of one of the clamping rings. Fig. 6 is adetail perspectiveview of one of the rubber packing rings. Fig. 7 is anend view of the middle ring or sleeve, showing a slightly modified formof centering sto 'lhis invention relates to the type of p couplinggenerally denominated fru ber pac ed pipe couplings which comprise amiddle ring or sleeve, two clamping rings,

or flanges, two rubber paclnngrings fitting in recesses in the clamp anden aging the ends and be ts connecting the clam in rings or flanges. inthe manufacture 0" this class of devices the middle ring is generallymade of cast iron, and is used to bridge over the abutting ends of thepipe sections. It is a well known fact that in making any castin s,certain defects, generally termed sand roles occur with considerable'fiequency, so that a casting is frequently pervious at one orrnorepoints and this occurs therefore in the manu racture of the cast ironmiddle minute apertures are seldom visible on an inspection of thecasting, and it would, therefore, follow that if laid in the of thesemiddle rin s would permit a considerahle leakage of the gas or otherfiuid mg nngs or flanges,

- able loss to tained and a regular were defective This testing dlering, as manufacture ipe of the middle rm rings. These 'guished frommeta ground many carried b the pi e line with which they are used. Thiswou d necessitate the uncovering and removal of the defective middlerings, and occasion a large expense and annoyance to the owners of the.pipe-lines. As a manufacturer of many thousands of these middle rings, 1have for some years successfully endevored to avoid this difiioulty, by

testing each and every middle ring manufactured, under either hydraulicor pneumatic ressure or both, and discarding'all rings which. under thehigh pressures used in testing the same, .develo ed .sahd holes or otherdefects, which would cause a leakage in use. The discarded rings areof-course useless except as scrap iron, and a considerme asv-themanufacturer resulted, and further, testing apparatus suitable fortesting rings of allthe various sizes manufactured, had to be urchasedaridrnaihy employed corps of workmen was required 'for the urpose oftesting the rings and discarding t ose which operation, therefore, adds.considerably to the cost of manufacture of these rings, in addition tothe loss from defective and discarded rings before noted v My presentinvention has for one of its objects to produce a couplin in which themidis impervious, so that no preliminarytesting of the rings isrequired, thus eliminating the two items of ex pense above noted, towit, the expenseof testing the rings. before use, and the loss from hiserfect-castings. To this end lmake the middle ring of wrought metal,instead of cast'metal, using steel'or wrought iron, but preferablysteel, whichis impervious and my invention. also contemplatescettainnovel features of construction and combination of parts,hereinafter fully described.

Referring to Figs. 1, 2, 3 and 6 oi the accompanying drawings, Arepresents the mid die ring of my'improved coupling which is made ofwrought metal, preferably steel. By the term wrought metal ll meansaductile metal such as is obtained from the in ct or bloom by rollin orotherwise, as distmwhich is cast-in a mold The middle rin A-has its mainbody of cylindrical form, int at each end is flared outwardly at anangle to the axis of the rin to form a lip a, the outer edge or face aat and-cooied which is perpendicular to the axis of the ring as shown.On its interior the ring A is roby any desired method of manufacturewhich will produce an impervious ring, of wrought metal, and myinvention further contem platesithat the said ring shall be made insucha manner, that the grain or longitudinal arrangement of particles shallbe in a direction around the rin instead of extendin parallel with theaxis the ring. This resu t may be accomplished in several ways,forexample,

the rin may be made from a flat rolled piece vid-in'g a ring in whichthe grain of the metal of stee or wrought iron of a len th substan-'tiall equalto the periphery of t e ring to be ma e therefrom, said barbein bent into the formof a ring and the ends we ded, thusprois in adirection around the walls of the ring, The 'ringcan be-given thedesired form by turning or in any other desired manner. A ring formed inthis manner has a much greater strength to resist internal and otherstrains and pressures, than a ring in which the ain ofthe metal runsparallel to its axis as 1n the latter case the rings frequently splitapart-and otherwise show weakness when=exposed to severe strains. d

B, B represent the clamping rings. or flanges each of which. consists ofa flatannular plate I) provided at its inner edge with'a proipctingannular flange b forming a curved pac ingrecess b withm the same,"andsurrounding the ring B is placed. The plate I) is rovided at suitableintervals with bolt holes 5 which are 7 substantially oval in form, toreceive similar sha ed portions, formed on the connecting bo ts, beneaththe heads thereof. The

outer. periphery of the plate I), is also provided with a flange bextending on the same side as the flange b. This flange b is in creasedin height (as at 1)) adjacent to the bolt holes I), and such ortions bare connected to the internal ange b by parallel,

or radial webs b b, arranged in pairs, the

webs ofeach pair bein located on opposite sides of a bolt hole. I hisform of flange is extremely light, and yet by arranging the webs onopposite sides of the bolt holes, and increasing the height of theflange b where it joins thesewebs, great strength is obtainednotwithstanding the lightness of the clamping ring. I

,C, 0 represent the packing rings of which two are employed in each couling. These rings are made preferably of ru ber, and are of peculiarform in cross section. Each ring has a rounded outer surface 0(substantially uadrantal) whichengages the inner face of t e packingrecess in the clamping ring B.

examination' of Fig. 2.

.E. The engagement of the inner pipe section upon which the.

The outer part of theq'in C is provided with a face or shoulder c whicis perpendicular to the axis of the ring, and is o" the same width asthe erpendicular end face of the middle rin The'ring C also has aninclined face 0' inc ined to the axis of'the ring, and extending fromthe .base of shoulder c to the inner diameter of the ring, and servingto fit between the inclined inner face of the ip eat the ends of themiddle ring, and the outer face of the pipe section around which thepacking ring is pJIaced, .as clearly shown in Fig. 2.

- D'are the clamping bolts which are passed through the oval shapedboltholes .in

the clampin rings and provided with nuts (1 (1. Each olt .is what istermed a track head bolt, and providedwith an oval portion-d below thehead-to passinto the oval bolt hole of the rings B, B, and prevent thebolts from turning while the nuts are turned up. w t v p The assemblingof the parts of this coup-v ling be clearly understood from an It is tobenoted that the perpendicular end faces a at the ends of, the middlering engage the perpendicular shoulders of the packing ring squarely,and compress the body of the packing back into the packing recess, andcrowd 1t between'the curved wall of the recess, and the exterior of thepipe section ace of the lip a of the middle-ring with the packing ringalso tendsto compress it between said lip and the pi e. The exterior ofthe lip a is but slightly ess in diameter than the packing recess in theclamping ring, as shown,

and thus when the parts are drawn together,

the packing ring is practically hermetically sealed within the clampingring and the lip of themiddle ring, and protected to a very large extentfrom disintegration when, buried inthe earth. V

By usin my improved impervious wrought metal mi dle ring, the dam erofleakage from this source is entire y eliminated. Again the wrought metalring is stronger and li hter than the cast iron ring, and the loss 0time, material and labor :re uired in testing the cast iron rings toinsure e 'ciency, is entirely obviated,

I .wish it to be understood that do not limitmyself to the use of anannular cen- 'tering stop such as is shown in Fig; 2, as it is notnecessary that this stop should be continuous, and in-some instances Iprovide the interior of the middle ring with a stop -com-' prisin aseries of separated lugs arranged in a p ane transverse to the axis ofthe ring. In Fig. 7 (Sheet 1) I have illustrated such a construction inwhich A represents the middle ring and a? a represent a seriesof.

lugs arranged-around t e interior of the ring (preferably four innumber) and forming the centering stop, the ring A being in otherjecting stop,

respects exactly similar to the ring A previously described.

What I claim and desire to secure by Letters Patent is 2- 1. In a pipecoupling, the combination with clamping rings and packing rings, of animpervious middle ring composed of wrought metal and having its endsconstructed to engage said packing rings, and clamping devicesconnecting said clamping rings substantially as described.

2. In a pipe coupling, the combination with clamping rings, and packingrings, of an impervious 'm1ddle ring, composed of wrought metal, havingthe grain extending around the ring, and having its ends constructed toengage the packing rings, and clamping devices connecting said clampingrings, substantially as descrlbed.

with clamping rings, and packing rings, of

ring composed of wrought metal, having the grain extending around thering, and having an interior proand end portions constructed to engagethe packing rings, and boltsv for connecting said clamping rings,substantially as described.

4. In a pipe coupling, the combination with clamping rings provided eachwith a packing recess, and packing rings located therein, of animpervious mlddle ring composed of wrought metal, having an internalprojecting centerin stop, and end portions extending outwar ly at anangle to the In a pipe coupling, the combination main body, forminglips, the end faces of said lips being perpendicular to the axis of themiddle ring, and clamping bolts connect- .ing said clamplng rings,substantially as described.

5. In a pipe coupling, the combination with the clamping rm s providedeach with a packing recess, pacIu'ng1 rings located in said ackingrecesses, eac provided with a shoul der perpendicular to' the axis ofsaid packing ring, and an inclined ortion extending from said shoulderameter of the ring, of a middle ring having an inclined outwardlyextending surface at eachend to engage the inclined portions of saidpacking rings, and end portions perpendicular to the axis of said theperpendicular shoulders of t rings, and bolts connecting said e pac mgclamping rings, substantially as described.

6. A middle ri for a pi e coupling of the. kind described, Iormed om astrip of wrought metal, bent into the form of a ring, and having itsends united by welding, sald ring being provided internally with acenterm stop and having outwardly extendingto t 'e inner dito en age,

annu ar portions at each endto engage packing rings, substantially asdescribed.-

In testimony whereof I aflix my signature, in the presence of twowitnesses.

SOLOMON R. DRESSER.

Witnesses:

J. H. GAYTON, H. -M. WIoK.

